Results The mean coupling rate of mPEG and bHb reached 30% ,and the eletrophoretic migration rate, absorption spectrum and colloid osmotic pressure of bHb were significantly changed.

• 结果 平均偶联程度达到30%25，导致牛血红蛋白的电泳迁移率，吸收光谱、粘度和胶体渗透压改变。